40140636 has 24 divisors (see below), whose sum is σ = 94402560. Its totient is φ = 13274352.

The previous prime is 40140601. The next prime is 40140641. The reversal of 40140636 is 63604104.

It is a super-2 number, since 2×40140636² = 3222541316968992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11646 + ... + 14693.

It is an arithmetic number, because the mean of its divisors is an integer number (3933440).

Almost surely, 2^40140636 is an apocalyptic number.

It is an amenable number.

40140636 is an abundant number, since it is smaller than the sum of its proper divisors (54261924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40140636 is a wasteful number, since it uses less digits than its factorization.

40140636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26473 (or 26471 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 40140636 is about 6335.6638168388. The cubic root of 40140636 is about 342.3955274804.

The spelling of 40140636 in words is "forty million, one hundred forty thousand, six hundred thirty-six".